3D MR Versus 3D CT for Glenohumeral Arthritis

MRI is performed using 3T scanners with a dedicated 16-channel shoulder array coils. The MRI sequences include 3-mm slice thickness and 0.5-mm gap width with a field of view of 14 or 15 cm. There were 6 diagnostic sequences with axial, coronal, and sagittal proton density weighting as well as coronal T2 with frequency selective fat suppression and sagittal T1 images.

The CT protocol consists of 3-mm axial images of the glenoid reconstructed into 1-mm sagittal and coronal 2D reconstructions using the following parameters: 120 kV, 280 mA, and pitch of 0.9. The CT data were also used to produce a 3D reconstruction of each glenoid.